Hardness
Hard
156 PPM · 9.1 GPG
Local water dashboard
Official source aggregationA source-transparent look at local hardness, associated public water systems, EPA compliance history, and the measurements that are—and are not—available for Hamilton County.
At a glance
EPA quarter 2026Q2
Hardness
Hard
156 PPM · 9.1 GPG
Compliance screen
Review needed
1 active health-based record
Lead 90th percentile
0 mg/L
0% of action level
Utility match
1 system
Serves 2,812 people system-wide
Hardness meter
Estimated local hardness
USGS hardness classification scale
156 PPM
Parts per million
156
mg/L as CaCO₃ equivalent
Grains per gallon
9.1
1 GPG ≈ 17.1 PPM
What this means at home
At 156 PPM, mineral scale can build up on fixtures and heating elements, reduce soap lather, and leave visible spotting. Hardness is primarily an aesthetic and appliance concern—not itself a tap-water safety rating.
USGS sites used
4
Nearest site
32.8 mi
Observation range
Jan 4, 2016–May 28, 2026
Estimate confidence
Low
Median of the latest qualifying hardness observation at each nearby monitoring site. Nearest monitoring location: WABASH RIVER AT NEW HARMONY, IN (Stream).USGS source documentation ↗
Regional context
These comparisons use other indexed ZIP estimates, not utility tap samples. They help show local context without replacing a household test.
Mcleansboro median
156 PPM
About the same1 indexed ZIP readings · Range 156–156 PPM
Illinois median
285 PPM
129 PPM lower1065 indexed ZIP readings · Range 115–408 PPM
EPA benchmark screen
Available numerical results from associated SDWIS community water systems, compared with the applicable action level or federal MCL. Federal measured-value coverage is incomplete.
Lead (PB90)
0 mg/L
Reported Dec 31, 2024
Copper (CU90)
Not available
No numerical 90th-percentile result
Numerical coverage
1 comparable result
Missing values remain blank; absence is not treated as a pass.
Measured in mg/L
Local 0
EPA limit 0.015
100% line = listed limit
| Contaminant or rule | System | Status | Period |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | IL0650200 | Archived | Jan 1, 2026through Mar 31, 2026 |
| TTHM | IL0650200 | Archived | Jan 1, 2026through Mar 31, 2026 |
| Lead and Copper Rule | IL0650200 | Unaddressed | Jan 1, 2026 |
| Public Notice | IL0650200 | Unaddressed | Aug 22, 2025 |
| LEAD AND COPPER RULE REVISIONS | IL0650200 | Unaddressed | Jul 2, 2025 |
| Lead and Copper Rule | IL0650200 | Unaddressed | Jul 1, 2025 |
| Consumer Confidence Rule | IL0650200 | Unaddressed | Jul 1, 2025 |
| TTHM | IL0650200 | Resolved | Jan 1, 2025through Mar 31, 2025 |
| Total Haloacetic Acids (HAA5) | IL0650200 | Resolved | Jan 1, 2025through Mar 31, 2025 |
| LEAD AND COPPER RULE REVISIONSHealth-based | IL0650200 | Unaddressed | Oct 17, 2024 |
| TTHM | IL0650200 | Resolved | Apr 1, 2023through Jun 30, 2023 |
| Total Haloacetic Acids (HAA5) | IL0650200 | Resolved | Apr 1, 2023through Jun 30, 2023 |
| TTHM | IL0650200 | Resolved | Jan 1, 2023through Mar 31, 2023 |
| Lead and Copper Rule | IL0650200 | Resolved | Dec 30, 2021through Jan 24, 2022 |
No reported violation does not prove that every contaminant was tested or absent; SDWIS measured values are incomplete and lag state records.
Solutions matcher
Matched to Mcleansboro ZIP 62859 using 156 PPM nearby hardness and 1 reported measurement benchmarks.
Scale protection
156 PPM is 1× the high-hardness trigger used by this matcher.
Designed to reduce scale on fixtures, water heaters, glassware, and plumbing throughout the home.
Compare whole-house systemsDrinking water protection
LEAD AND COPPER RULE REVISIONS has a measured benchmark flag or active health-based SDWIS record in this profile.
A certified multi-stage RO system targets a broader range of dissolved contaminants at the kitchen tap.
Explore under-sink filtrationAffiliate disclosure: we may earn a commission from qualifying purchases, at no added cost to you. Product matching is educational and does not replace certified water testing.
Frequently asked
EPA ECHO reports 1 active health-based violation among the associated community water systems. Review the affected utility's current notice and Consumer Confidence Report.
Nearby USGS observations produce an estimate of 156 PPM, or 9.1 grains per gallon, classified as hard. This is not a household tap measurement.
At 156 PPM, a correctly sized whole-house softener can reduce scale and hard-water spotting. It does not replace contaminant filtration.